Optimum Nutrition Serious Mass 12 lbs Bag Weight Gainer FLAVOR:Strawberry Better lid design

Better lid design

Each serving of Athlete’s Whey is packed with 30g of high-quality

xanthan gum

It also supports anabolic hormone production (like IGF-1) and helps reduce muscle breakdown during intense training

Optimum Nutrition Serious Mass 12 lbs Bag Weight Gainer FLAVOR:Strawberry Better lid designSUPPORTS MUSCLE BUILDING & WEIGHT GAIN GOALS Optimum Nutrition Serious Mass is the ultimate in weight gain formulas. With 1,250 calories per serving and 50 grams of protein for muscle recovery support, this instantized powder makes the ideal post workout and between meals shake for sizing up your goals. Serious Mass provides you with the tools you need to pack on the pounds and help you develop the physique youve always wanted. Optimum Nutrition